#include    <stdio.h>

/**********found**********/

char fun(char  ch)

{

/**********found**********/

   if (ch>='0' && ch<='9')

/**********found**********/

      return  '9'- (ch-'0');

   return  ch ;

}

main()

{  char  c1, c2;

   printf("\nThe result  :\n");

   c1='2';   c2 = fun(c1);

   printf("c1=%c    c2=%c\n", c1, c2);

   c1='8';   c2 = fun(c1);

   printf("c1=%c    c2=%c\n", c1, c2);

   c1='a';   c2 = fun(c1);

   printf("c1=%c    c2=%c\n", c1, c2);

   getchar();

}

